Did I mention that I already have 2/3rds of the materials purchased? Neither the fabric nor the memory toppers are returnable. I guess I'll order the foam and mock up a cushion. If it's absolutely awful I can try to resell the materials on eBay. Otherwise I'll have to live with my poor choices until I can afford to rebuild the cushions right later. Your suggestions make perfect sense to me...but ignorance was bliss. I thought that I had a pretty good plan. I guess at the very least I will drill large air holes in the plywood support to try to eliminate the cushion balloon effect. I could also find good mattress pads to help the bedding breathe.
Thanks for clueing me in,
Have you never questioned those who travel? Have you paid no regard to their accounts- Job 21:29